I want to have a better understanding of what each entry does and what happens when it requires a reindex.
I've read the Magento Docs fully but they aren't known for breaking down things into the most understandable pieces. I know the difference/functionality of update on save and scheduled. Just not quite sure what it is doing behind the scenes.
Specifically, I do not understand what the entries for :
Rebuild Design Config index and Rebuild customer grid index are for.
Is there a directory I can locate these files in and change them manually?
Any help will be greatly appreciated.